REVENUE FROM DIAMONDS IS SET TO CONTRIBUTE US$600 MILLION TO FISCUS THIS YEAR.
The diplomats will visit four companies, Mbada, Marange Resources, Diamond Mining Corporation (DMC) and Anjin. They will also visit the ZRP Diamond Base.
Diamonds from Marange have courted controversy amid calls by civil society organisations that there is no transparency in the marketing of the gems.
Finance minister Tendai Biti has been complaining that Anjin has not been remitting money to treasury. Anjin is a joint venture between the Chinese and the Zimbabwe Defence Industries.
Biti has said despite claims that the Zimbabwe Mining Development Corporation (ZMDC) owns Anjin, the state entity had no equity in the diamond producer.